<template>
  <div>
    <span v-for="(val, index) in arr" :key="index"
      >{{ val }}<input type="checkbox" v-model="arr2" :value="val"
    /></span>
    <p>相加总和为:{{ zh }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      arr2: [],
    };
  },
  computed: {
    zh() {
      return this.arr2.reduce((sum, val) => {
        return (sum += val);
      }, 0);
    },
  },
};
</script>

<style>
</style>>